Infinity Reference REF407F 4" Coaxial Speakers Input Impedance: 20kΩ

Input Impedance: 20kΩ

An included wired remote bass level control for Mono and 5 channel that can be mounted for convenient volume adjustment from driver seat

The cones move more air than other speakers of similar size

5-channel car amplifier 50 watts RMS x 4 + 320 watts RMS x 1 at 4 ohms

along with adapters that allow for surface- or flush-mounting

Infinity Reference REF407F 4" Coaxial Speakers Input Impedance: 20kΩA modern classic Just as they were throughout my 16 years as a Crutchfield Advisor, Infinity's Reference Series speakers remain a popular choice for upgrading from factory speakers. The REF407F 4" 2 way car speakers follow that Infinity heritage by offering the killer combo of high efficiency and superb sound. These Infinity speakers offer larger magnets than most factory speakers for bigger, better sound. Infinity's famous ingredients Reference